Which of the following is NOT a pair of co-prime numbers?
22, 24
The correct answer is 22, 24.
For example, for 3 and 7, \text{LCM}(3, 7) = 3 \times 7 = 21. Consecutive integers are always co-prime. For example, 21 and 22 are consecutive, and \text{GCD}(21, 22) = 1. The GCD can be found using methods other than listing factors, such as the Euclidean algorithm, which is very efficient for larger numbers.
Similar Questions
Which of the following is a prime number?
What is the average of prime numbers lying between 7 and 37?
- The number of all prime numbers between 0 and 44 is:
The sum of three prime numbers is 90. If one of them exceeds another by 30, then one of the numbers is:
How many prime numbers are there between 30 to 85?
Which of the following is a prime number?
Important Questions from Prime Numbers
a and b are two positive integers such that the least prime factor of a is 2 and the least prime factor of b is 5. Then the least prime factor of a + b is
Which of the following is a pair of coprime numbers ?
If product of two prime numbers A and B (A < B) is 221, then what is the value of (4A – 3B)?
Sum of all the prime numbers between 70 and 100 is :
Which one of the following numbers is a prime number?
